Didn't you already send him a version yesterday? If you really want to approach him, why don't you initiate a small lightheaded flirt and ask him that way in person? Probably more likely to receive a positive reaction.

Also, I find it interesting that you make lengthy posts about this letter but didn't even share what happened in your therapy session today other than you did not want to go at first (given it's a therapy forum). Is this kind of distraction a really good thing for you? Then next thing we may hear is how your T does not care about you. Not trying to be judgmental, but it's a pattern hard not to comment on.